623616673 has 2 divisors, whose sum is σ = 623616674. Its totient is φ = 623616672.

The previous prime is 623616671. The next prime is 623616701. The reversal of 623616673 is 376616326.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 327501409 + 296115264 = 18097^2 + 17208^2 .

623616673 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 623616673 - 2¹ = 623616671 is a prime.

Together with 623616671, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (623616671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311808336 + 311808337.

It is an arithmetic number, because the mean of its divisors is an integer number (311808337).

Almost surely, 2^623616673 is an apocalyptic number.

It is an amenable number.

623616673 is a deficient number, since it is larger than the sum of its proper divisors (1).

623616673 is an equidigital number, since it uses as much as digits as its factorization.

623616673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 40.

The square root of 623616673 is about 24972.3181342862. The cubic root of 623616673 is about 854.3567191468.

The spelling of 623616673 in words is "six hundred twenty-three million, six hundred sixteen thousand, six hundred seventy-three".